EP0575023A1 - Circuit d'amorçage pour le frein, fonctionnant par courant continu, d'un moteur électrique - Google Patents

Circuit d'amorçage pour le frein, fonctionnant par courant continu, d'un moteur électrique Download PDF

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Publication number
EP0575023A1
EP0575023A1 EP93250165A EP93250165A EP0575023A1 EP 0575023 A1 EP0575023 A1 EP 0575023A1 EP 93250165 A EP93250165 A EP 93250165A EP 93250165 A EP93250165 A EP 93250165A EP 0575023 A1 EP0575023 A1 EP 0575023A1
Authority
EP
European Patent Office
Prior art keywords
coil
brake
switching
switching element
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93250165A
Other languages
German (de)
English (en)
Other versions
EP0575023B1 (fr
Inventor
Klaus Augenreich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0575023A1 publication Critical patent/EP0575023A1/fr
Application granted granted Critical
Publication of EP0575023B1 publication Critical patent/EP0575023B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/02—Details of stopping control
    • H02P3/04—Means for stopping or slowing by a separate brake, e.g. friction brake or eddy-current brake
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/30—Circuits for braking, traversing, or slewing motors

Definitions

  • the invention relates to a control circuit for a DC-operated brake of an electric motor, in particular a pole-changing three-phase motor according to the preamble of claim 1.
  • Such electric motors are also referred to as brake motors and, among other things. used to drive hoists.
  • brake motors are also referred to as brake motors and, among other things. used to drive hoists.
  • the brake responds quickly after switching off the power supply to the motor in order to prevent a load hanging on the hoist from sagging, and also to switch the brake back on quickly after switching on the power supply to the motor is ventilated to prevent the motor from starting against the brake. This minimizes wear on the brake pads.
  • a brake for an AC motor is known from DE 36 13 294 C2.
  • the motor is blocked in the idle state by the brake activated by spring action.
  • the brake is released for the operating state of the motor by a DC-operated Electromagnets.
  • the electromagnet has an overall coil divided into an acceleration winding and a holding winding, the two windings being connected in series.
  • To release the brake only the acceleration coil is initially supplied with current after the mains voltage has been applied to the motor. Since the acceleration coil has a smaller internal resistance than the overall coil, a large current flows, which causes a large magnetic flux and thus a quick pull-in effect and a short response time of the brake.
  • the brake current is switched to the entire coil via a timer after the brake has been released. Due to the greater resistance of the entire coil, a lower holding current now flows.
  • the holding winding of the coil is arranged in a freewheeling circuit with a freewheeling diode. The rapid shutdown is additionally accelerated by the arrangement of a varistor in the freewheeling circuit, by means of which it can be switched with high resistance.
  • the brake or its entire coil is switched off when the current runs towards zero in one phase of the motor winding.
  • the above-described brake for an AC motor proves to be disadvantageous, since the energy supply to the brake is carried out in a single-pulse manner via a single line circuit.
  • This type of energy supply leads to correspondingly asymmetrical currents, as a result of which the repeatability for the surge current of the accelerator coil is reduced.
  • a jog mode for fast brake motors with repetition intervals for the surge current of approx. 100 ms is difficult to achieve with this.
  • the construction of the entire coil from two different coil parts proves to be very complex and therefore expensive.
  • the ratio of the acceleration current to the continuously present holding current of the electromagnet is disadvantageously predetermined by the design of the acceleration coil and the holding coil.
  • the invention has for its object to provide a circuitry simple control circuit for DC-operated brakes of an electric motor, in particular a pole-changing three-phase motor, which enables minimized switching times of the brake and at the same time a high repeatability of the switching process of the brake.
  • the basic idea of the invention consists in the arrangement of an electronic switching element in a free-wheeling circuit of the brake coil and a further electronic switching element in the coil circuit and their parallel control via a switching system for switching the brake coil on and off and the control of the switching element in the coil circuit fully controlling to overexcitation of the coil and then pulse-width modulating to limit the coil voltage to a holding voltage, to minimize the response times of the coil of the DC-operated brake and thus to increase its readiness to repeat.
  • the holding voltage of the coil is determined by the pulse-width-modulated switching element after full switching back to the nominal voltage, so that the thermal load on the brake coil is minimized and the entire control circuit can thus be accommodated in a terminal box of a motor. It has also proven to be advantageous that, by tapping off all the winding phases, the brake coil power is distributed evenly over all phases, thus eliminating the need to overdimension the motor supply line.
  • the drawing shows a drive circuit according to the invention for an electric motor 1 designed as a double pole-changing three-phase motor with a brake 2.
  • the brake 2 is spring-loaded in the currentless state in engagement with a rotating part of the electric motor 1.
  • An electromagnet is used to actuate or release the brake 2 a coil 3 is provided, which is fed via a control circuit 4 from the voltage supply of the electric motor 1.
  • the control circuit 4 is connected on the input side to the winding phases 5 of the electric motor 1.
  • the control circuit 4 essentially consists of a rectifier circuit 6 arranged on the input side and connected to the winding phases 5, one for this purpose protective circuit 8 connected in parallel and a switching system 9 arranged on the output side.
  • the rectifier circuit 6 is essentially constructed from rectifier half bridges with pairs of rectifier diodes 7, each of which is connected to the winding phases 5 of the electric motor 1. Correspondingly, six rectifier half-bridges are provided in the case of an electric motor 1 which can be switched with two poles. The plus and minus ends of the rectifier half bridges are each connected to one another and to the minus 10 and plus lines 11. The rectifier circuit 6 delivers a well-smoothed DC voltage in a three-phase voltage system without further effort.
  • the lines 10 and 11 are connected to a protective circuit 8, through which the mains voltage peaks of the three-phase voltage system are limited, in order to protect both the motor windings and the subsequent switching system 9 and the coil 3 of the brake 2.
  • the protective circuit 8 is constructed differently depending on the requirements of the motor manufacturer and essentially consists of combinations of commercially available tens diodes and resistors or of varistors and resistors and, if necessary, of capacitors.
  • the rectified winding voltage present on the lines 10 and 11 feeds not only the protective circuit 8 described above but also a measuring and switching system 9 and the coil 3 of the brake 2.
  • the switching system 9 controls two electronic switching elements 14 and 15, which are arranged one behind the other in the negative line 10 in front of the coil 3.
  • the switching element 14 is integrated in a freewheeling circuit for the coil 3, the freewheeling circuit in each case by a section of the plus 11 and minus line 10 in front of the coil 3 and a freewheeling line 16 connecting the plus line 11 to the minus line 10 via a freewheeling diode 12 arranged in the blocking direction is formed.
  • the switching elements 14 and 15 are simultaneously switched on or off by the switching system 9 for releasing or applying the brake depending on the rectified voltage present in the lines 10, 11 and thus depending on the three-phase voltage present on the electric motor 1.
  • the threshold voltage for this switching operation is in the range below the nominal voltage of the three-phase supply of the electric motor 1, the tolerances that occur being taken into account by a sufficient distance therefrom.
  • the switching element 15 In contrast to the switching element 14 in the freewheeling circuit, which switches fully when the brake is released, the switching element 15 only switches fully through only to release the brake 2 and is then clocked using a commercially available clock circuit.
  • the clocked operation of the switching element 15 is preferably pulse-width modulated.
  • This mode of operation of the switching element 15 makes it possible to reduce the starting voltage by approximately 550 volts for overexcitation of the coil 3 to a holding voltage of approximately 100 volts.
  • the switchover from the starting voltage to the holding voltage is time-dependent in a large number of applications.
  • switching takes place after approximately 80 to 120 ms.
  • the switching element 15 is controlled as a function of the current flowing in the coil 3.
  • a sensor 13 which is designed in particular as a Hall sensor and supplies the actual value for the control, is arranged in the minus line 10.
  • the switching elements 14 and 15 are generally controlled via tens diodes or comparators.
  • the freewheeling crystal with the freewheeling diode 12 described above is used for rapid de-excitation of the coil 3.
  • a varistor 18 is arranged in parallel with the switching element 14, with which the freewheeling circuit can be switched with high resistance can.
  • protective elements (not shown in the drawing) for the preferably electronically designed switching elements 14 and 15 are contained in the measuring switching system 9.
  • the use of two switching elements 14 and 15 ensures that, even in the event of a fault, no more current flows and the DC-operated brake is therefore switched off and is therefore reliably engaged.
  • the switching element 15 will delete the clocked low winding current with delay due to the free-wheeling diode 12.
  • a very high winding current flows, which, however, is interrupted by the switching element 14 with only a slight delay.
  • an additional three-phase voltage line 17 which supplies the rectifier circuit 6 is provided, which in turn is routed to three rectifier half-bridges in order to be able to carry out a test operation of the brake which is independent of the motor operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Braking Systems And Boosters (AREA)
  • Control Of Direct Current Motors (AREA)
EP93250165A 1992-06-16 1993-06-15 Circuit d'amorçage pour le frein, fonctionnant par courant continu, d'un moteur électrique Expired - Lifetime EP0575023B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4220122A DE4220122A1 (de) 1992-06-16 1992-06-16 Ansteuerschaltung für gleichstrombetätigte Bremsen polumschaltbarer Drehstrommotoren
DE4220122 1992-06-16

Publications (2)

Publication Number Publication Date
EP0575023A1 true EP0575023A1 (fr) 1993-12-22
EP0575023B1 EP0575023B1 (fr) 1996-10-02

Family

ID=6461396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93250165A Expired - Lifetime EP0575023B1 (fr) 1992-06-16 1993-06-15 Circuit d'amorçage pour le frein, fonctionnant par courant continu, d'un moteur électrique

Country Status (4)

Country Link
EP (1) EP0575023B1 (fr)
AT (1) ATE143753T1 (fr)
DE (2) DE4220122A1 (fr)
ES (1) ES2092753T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010975A1 (fr) * 1997-08-25 1999-03-04 Sew-Eurodrive Gmbh & Co. Procede et circuit pour le fonctionnement d'un frein mecanique a actionnement electromagnetique d'un moteur electrique
DE19740016A1 (de) * 1997-09-11 1999-03-18 Sew Eurodrive Gmbh & Co Schaltungsanordnung und Verfahren zum Betrieb einer Erregerspule einer elektromagnetisch betätigbaren, mechanischen Bremse eines Elektromotors
EP0913922A1 (fr) * 1997-10-29 1999-05-06 Rexnord Corporation Régulation de frein commutant rapidement pour un moteur électrique
WO2006045379A1 (fr) * 2004-10-22 2006-05-04 Sew-Eurodrive Gmbh & Co. Kg Frein electromagnetique, dispositif de commande sure d'un frein electromagnetique, moteur electrique et frein
EP1675249A2 (fr) * 1999-06-10 2006-06-28 Sew-Eurodrive GmbH & Co. KG Moteur électrique et une gamme de moteurs
WO2007118576A1 (fr) * 2006-04-10 2007-10-25 Chr. Mayr Gmbh + Co. Kg Redresseur d'alimentation d'une bobine de freinage
WO2009127772A1 (fr) * 2008-04-17 2009-10-22 Kone Corporation Dispositif et procédé dans un ascenseur sans contrepoids
WO2010057605A1 (fr) * 2008-11-19 2010-05-27 Sew-Eurodrive Gmbh & Co. Kg Procédé de fonctionnement d'un entraînement, ainsi qu'entraînement
EP1926203A3 (fr) * 2006-11-21 2012-09-12 Fanuc Corporation Appareil de commande de moteur pour commander et freiner un moteur équipé par frein

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006286B4 (de) * 2005-02-10 2009-09-10 Schneider Electric Motion Deutschland Gmbh & Co. Kg Elektrischer Antrieb
DE102006049490A1 (de) * 2006-10-17 2008-04-24 Lti Reenergy Gmbh Ansteuerschaltung für Gleichstrommotoren mit Bremse und Notbetriebsversorgungseinrichtung
CN108217465A (zh) * 2018-02-02 2018-06-29 中国核工业二三建设有限公司 一种吊车穿绳控制系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU826536A1 (ru) * 1979-03-21 1981-04-30 Solenkov Vitalij V Самотормозящийся электродвигатель переменного тока
EP0097237A1 (fr) * 1982-06-22 1984-01-04 Eberhard Bauer Elektromotorenfabrik GmbH Montage pour l'interruption du courant de roue libre d'aimants de desserrage de moteurs de frein
EP0386767A2 (fr) * 1989-03-10 1990-09-12 Man Ghh Logistics Gmbh Installation d'entraînement, notamment pour un dispositif de levage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1137844B (de) * 1961-03-01 1962-10-11 Siemens Ag Schutzschaltung fuer Lasthubmagnete
DD229838A1 (de) * 1984-11-30 1985-11-13 Dresden Elektromaschinenbau Verfahren zur abschaltpositionierung von thyristorgesteuerten drehstrom-asynchronbremsmotoren
DE3741133C1 (de) * 1987-12-04 1989-05-24 Werac Elektronik Gmbh Antriebsvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU826536A1 (ru) * 1979-03-21 1981-04-30 Solenkov Vitalij V Самотормозящийся электродвигатель переменного тока
EP0097237A1 (fr) * 1982-06-22 1984-01-04 Eberhard Bauer Elektromotorenfabrik GmbH Montage pour l'interruption du courant de roue libre d'aimants de desserrage de moteurs de frein
EP0386767A2 (fr) * 1989-03-10 1990-09-12 Man Ghh Logistics Gmbh Installation d'entraînement, notamment pour un dispositif de levage

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010975A1 (fr) * 1997-08-25 1999-03-04 Sew-Eurodrive Gmbh & Co. Procede et circuit pour le fonctionnement d'un frein mecanique a actionnement electromagnetique d'un moteur electrique
US6291952B1 (en) 1997-08-25 2001-09-18 Sew-Eurodrive Gmbh & Co. Method and circuit arrangement for operating an electromagnetically actuated mechanical brake of an electric motor
DE19740016A1 (de) * 1997-09-11 1999-03-18 Sew Eurodrive Gmbh & Co Schaltungsanordnung und Verfahren zum Betrieb einer Erregerspule einer elektromagnetisch betätigbaren, mechanischen Bremse eines Elektromotors
DE19740016C2 (de) * 1997-09-11 2002-04-25 Sew Eurodrive Gmbh & Co Schaltungsanordnung und Verfahren zum Betreiben einer Erregerspule einer elektromagnetisch betätigbaren, mechanischen Bremse eines Elektromotors
EP0913922A1 (fr) * 1997-10-29 1999-05-06 Rexnord Corporation Régulation de frein commutant rapidement pour un moteur électrique
EP1675249A2 (fr) * 1999-06-10 2006-06-28 Sew-Eurodrive GmbH & Co. KG Moteur électrique et une gamme de moteurs
EP1059723B1 (fr) * 1999-06-10 2006-08-30 Sew-Eurodrive GmbH & Co. KG Moteur avec boitier de connection
EP1675249A3 (fr) * 1999-06-10 2013-08-21 SEW-EURODRIVE GmbH & Co. KG Moteur électrique et une gamme de moteurs
WO2006045379A1 (fr) * 2004-10-22 2006-05-04 Sew-Eurodrive Gmbh & Co. Kg Frein electromagnetique, dispositif de commande sure d'un frein electromagnetique, moteur electrique et frein
DE102005027502B4 (de) * 2004-10-22 2009-07-09 Sew-Eurodrive Gmbh & Co. Kg Elektromagnetisch betätigbare Bremse, Vorrichtung zur sicheren Ansteuerung einer elektromagnetisch betätigbaren Bremse, Elektromotor und Bremse
WO2007118576A1 (fr) * 2006-04-10 2007-10-25 Chr. Mayr Gmbh + Co. Kg Redresseur d'alimentation d'une bobine de freinage
EP1926203A3 (fr) * 2006-11-21 2012-09-12 Fanuc Corporation Appareil de commande de moteur pour commander et freiner un moteur équipé par frein
WO2009127772A1 (fr) * 2008-04-17 2009-10-22 Kone Corporation Dispositif et procédé dans un ascenseur sans contrepoids
WO2010057605A1 (fr) * 2008-11-19 2010-05-27 Sew-Eurodrive Gmbh & Co. Kg Procédé de fonctionnement d'un entraînement, ainsi qu'entraînement

Also Published As

Publication number Publication date
DE4220122A1 (de) 1993-12-23
ES2092753T3 (es) 1996-12-01
EP0575023B1 (fr) 1996-10-02
ATE143753T1 (de) 1996-10-15
DE59304020D1 (de) 1996-11-07

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